It provides the runtime components (DLLs) required to run C++ applications built with Visual Studio 2019. Without it, many programs will crash or refuse to start.
The Visual C++ Redistributable is that library. It is a package of standard code that developers can "borrow" so they don't have to write the basics from scratch.
🔗 Latest supported Visual C++ 2019 Redistributable (change x64 → x86 for 32‑bit)